TY  - SER
AU  - Wykstra, R.
TI  - Manpower vs machinery: a case study of conservation works in lesotho
T2  - A.I.D. research & development abstracts ; 
PY  - 1981///
CY  - Washington-US : 
PB  - United States Agency for International Development, 
N1  - Artículo dentro de: Economics; Sumarios de investigación
ER  -